Hello dear.. First of all remove all myths & misconceptions from your mind about masturbation. In fact, Masturbation is completely normal & doesn t have any bad effect to the body and mind. Regarding the problem of not able to memorize, it s mostly related to anxiety & lack of concentration. So...don t worry about this & stay relaxed. Avoid stress...practice meditation..this helps in improving concentration & builds up the confidence level. Have a diet rich in fruits, vegetables, fish, nuts & honey. Avoid smoking & alcohol. One more thing...avoid consuming any over the counter medication which claim to increase the memory power or improve performance...it may be harmful. Best thing is to eat a healthy diet, exercise regularly, avoid stress, get good sleep, think positive and stay happy. Wishing you a Healthy Life. Best wishes for your board exams. Take care.